3D printing mimics metals p.265

doi: 10.1038/d41586-019-00139-4

Screen time: how much is too much? p.265

A vast analysis tackles a defining question of the digital age.

doi: 10.1038/d41586-019-00137-6

Cinematic and scientific techniques combine to show how a long-extinct creature moved p.266

doi: 10.1038/d41586-019-00138-5

Colombia creates its first science ministry p.273

But country-wide structural and cultural changes must occur to truly improve the nation's research environment, scientists say.

doi: 10.1038/d41586-019-00087-z

Indian scientists protest against unscientific claims made at conference p.274

For the second time in four years, the Indian Science Congress has been used as a platform for outlandish beliefs.

doi: 10.1038/d41586-019-00073-5

Serbia is rethinking science — but the reforms could cost hundreds of jobs p.275

A government plan to overhaul research funding has drawn mixed reactions in a country that last awarded grants almost 10 years ago.

doi: 10.1038/d41586-018-07872-2

Dismissals cause turmoil for US ecology project p.276

Sudden leadership changes at the National Ecological Observatory Network prompt the resignation of its top scientist and the dissolution of its advisory board.

doi: 10.1038/d41586-019-00105-0

Machine learning leads mathematicians to unsolvable problem p.277

Simple artificial-intelligence problem puts researchers up against a logical paradox discovered by famed mathematician Kurt Gödel.

doi: 10.1038/d41586-019-00083-3

Hawaiian-language experts make their mark on the Solar System p.278

Naming project aims to strengthen Indigenous connections to discoveries made at state’s many telescopes.

doi: 10.1038/d41586-019-00098-w

How much can forests fight climate change? p.280

doi: 10.1038/d41586-019-00122-z

Hidden history of the Milky Way revealed by extensive star maps p.284

doi: 10.1038/d41586-019-00123-y

Mitochondrial DNA can be inherited from fathers, not just mothers p.296

A tenet of elementary biology is that mitochondria — the cell’s powerhouses — and their DNA are inherited exclusively from mothers. A provocative study suggests that fathers also occasionally contribute.

doi: 10.1038/d41586-019-00093-1

Protein modification fine-tunes the cell’s force producers p.297

Identification of the enzyme that catalyses a site-specific modification of the protein actin reveals how this change modulates the function of the cell’s force-producing machinery.

doi: 10.1038/d41586-018-07882-0

Implanted device enables responsive bladder control p.298

Implants that electrically stimulate nerves continuously to treat disease can cause off-target effects and pain. An implant that uses light to modulate the activity of genetically modified nerve cells might offer a solution.

doi: 10.1038/d41586-018-07811-1

Heart of a stellar explosion revealed p.300

doi: 10.1038/d41586-019-00043-x

Mutations differ in normal and cancer cells of the oesophagus p.301

What determines whether genetic mutations lead to cancer? Analyses of healthy cells in the human oesophagus reveal that a high level of genetic alterations arises as people age, yet this doesn’t usually result in cancer.

doi: 10.1038/d41586-018-07737-8

Atomic-scale hardening mechanisms apply on larger scales in ‘architected’ materials p.303

doi: 10.1038/d41586-019-00042-y

Damage-tolerant architected materials inspired by crystal microstructure p.305

doi: 10.1038/s41586-018-0850-3

Age-related remodelling of oesophageal epithelia by mutated cancer drivers p.312

doi: 10.1038/s41586-018-0811-x

Structural basis of coreceptor recognition by HIV-1 envelope spike p.318

doi: 10.1038/s41586-018-0804-9

Signatures of a jet cocoon in early spectra of a supernova associated with a γ-ray burst p.324

doi: 10.1038/s41586-018-0826-3

The surprisingly large neutron capture cross-section of ⁸⁸Zr p.328

doi: 10.1038/s41586-018-0838-z

Quantum Hall effect based on Weyl orbits in Cd₃As₂ p.331

doi: 10.1038/s41586-018-0798-3

Observation of the nonlinear Hall effect under time-reversal-symmetric conditions p.337

doi: 10.1038/s41586-018-0807-6

Photoredox catalysis using infrared light via triplet fusion upconversion p.343

doi: 10.1038/s41586-018-0835-2

Inner ear development in cyclostomes and evolution of the vertebrate semicircular canals p.347

doi: 10.1038/s41586-018-0782-y

Reverse-engineering the locomotion of a stem amniote p.351

doi: 10.1038/s41586-018-0851-2

Subcellular transcriptomes and proteomes of developing axon projections in the cerebral cortex p.356

doi: 10.1038/s41586-018-0847-y

A wireless closed-loop system for optogenetic peripheral neuromodulation p.361

doi: 10.1038/s41586-018-0823-6

Tissue-resident memory CD8⁺ T cells promote melanoma–immune equilibrium in skin p.366

doi: 10.1038/s41586-018-0812-9

SETD3 is an actin histidine methyltransferase that prevents primary dystocia p.372

doi: 10.1038/s41586-018-0821-8

Calicivirus VP2 forms a portal-like assembly following receptor engagement p.377

doi: 10.1038/s41586-018-0852-1

Structures of an RNA polymerase promoter melting intermediate elucidate DNA unwinding p.382

doi: 10.1038/s41586-018-0840-5